The last census year was 1995. According to the 2001 Annual Statistical Abstract, "for the years 1999?2001 the numbers have been derived by using estimates of different annual growth rates for both natural increase in population and numbers of naturalized citizens during 1995?1998."
The population figures of Hawalli and Mubarak Al-Kabeer governorates were aggregated and called Hawalli-incl.Mubarak Al-Kabeer to match the boundaries.

Administrative Spatial Edits and Notes:

According to the 2001 Annual Statistical Abstract, there are now a total of 6 govenorates (administrative level 1) in Kuwait. The newest governorate, Mubarak Al-Kabeer, appears to have been added in 2000 and was split from Hawalli. To create matched boundaries at two time periods, Hawalli and Mubarak Al-Kabeer governorates were aggregated and called Hawalli-incl.MubarakAl-Kabeer.
The governorate called Al Kuwayt in the spatial data is called Capital in the population data.